Front wheel brake
1 - fitting for bleeding the drive of the brake mechanism of the front brakes; 2 - connecting tube of working cylinders; 3 – wheel cylinder piston; 4 - wheel cylinder retainer; 5 - lining of the brake shoe; 6 - sealing ring; 7 - dust cap; 8 - pins for fastening the pads; 9 – a bolt of fastening of a support to an arm; 10 – rotary fist; 11 – caliper mounting bracket; 12 - support; 13 - protective cover; 14 - cotter pin; 15 - clamping spring pads; 16 - brake pads; 17 - wheel cylinder; 18 - brake disc
Front wheel brake caliper parts
1 - piston; 2 - dust cap; 3 - sealing ring; 4 – support with cylinders; 5 – a connecting tube of wheel cylinders; 6 - air outlet fitting; 7 - clamping spring pads; 8 – fingers of fastening of brake pads; 9 - cotter pins; 10 - springs; 11 - brake pads
The brake mechanism of a forward wheel is disk. It consists of the ones shown in Fig. Front Wheel Brake &Caliper Front Wheel Brake Caliper Parts 12 (4) complete with working cylinders 17, brake disc 18, two brake shoes 16 (11), connecting fingers 8 (8) and pipelines.
The caliper is attached to the bracket 11 with two bolts 9, which are locked by bending the bolts of the locking plates to the edge. The bracket 11, in turn, is attached to the flange of the steering knuckle 10 together with the protective cover 13 and the rotary lever. The caliper has a radial groove through which the brake disc 18 passes and two transverse grooves for accommodating brake pads 16. The lugs of the caliper have two windows with guide grooves in which two opposite cylinders 17 are installed. To fix the cylinders relative to the caliper, a spring lock is installed in the cylinder 4, included in the side groove of the caliper.
Each cylinder has a piston 3 (1), which is sealed with a rubber ring 6 (3). It is located in the groove of the cylinder and tightly compresses the surface of the piston. The cylinder cavity is protected from contamination by a rubber cap 7 (2).
The working cavities of the cylinders are interconnected by a pipeline 2 (5). Fitting 1 is screwed into the outer cylinder (6) for bleeding the front brake drive circuit, to the inner one - a hose fitting for supplying brake fluid.
The piston 3 rests against the brake pads 16, which are mounted on the fingers 8 and are pressed against them by the springs 15 (7). Pins 8 are held in the cylinder by cotter pins 14 (9).
The brake disc 18 is attached to the wheel hub with two dowel pins.